非水体系中单分子层保护团簇在超微铂电极上的量子化充电

非水体系中单分子层保护团簇在超微铂电极上的量子化充电;单层保护团簇;量子化电容充电

Quantized Capacitance Charging of Monolayer-protected Clusters on Pt Ultramicroelectrode

The behavior of quantized capacitance charging of the monolayer protected clusters(MPC) in tetrahydrofuran(THF) solution on the platinum ultramicroelectrode and bulk Pt electrode have been investigated for comparison. The results showed that MPC has many advantages over the bulk Pt electrode. With platinum microelectrode, there are six pairs of quantized capacitance charging peaks on the differential pulse cyclic voltammograms in 0.1 mol/L THF solution of hexanethiol protected MPC without electrolyte, and good electrochemical reversibility of the peaks could be observed even at high scan rate in cyclic voltammogram. The single potential step chronocoulometric experiments displayed that each quantized capacitance charging peak corresponds to one electron transfer across the interface of the MPC.